Attachment for sawmill-hogs.



F. E. MARTIN. ATTACHMENT FOR SAWMILL HOGS.

APPLICATION FILED FEB. 24, 1911.

Patented July 11, 1911.

COLUMBIA PLANOURAPH 60-, WASHINGTON, n. c. Q

FREDERICK E. MARTIN, 0F BONAMI, LOUISIANA.

ATTACHMENT FOR SAWMILL-HOGS.

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Specification of Letters Patent.

Patented July 11, 1911.

Application filed. February 24, 1911.. Serial No. 610,578.

To all whom it may concern:

Be it known that I, FREDERICK E. MARTIN, a citizen of the United States, residing at Bonami, in the parish of Calcasieu and State of Louisiana, have invented certain new and useful Improvements in Attachments for Sawmill-Hogs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

In the reduction of wood fiber to a uniform granular condition for its varied subsequent uses the material is subjected to a grinding action in a machine known as a sawmill hog, comprising essentially a rotating cutter head and a stationary anvil. The cutter head consisting of a pair of truncated cone sections carrying knives, and oppositely disposed to provide a working chamber of V-shape in cross section, and between which the anvil is secured. With this arrangement it frequently happens that pieces of wood in the form of slivers or shims escape the necessary reducing treatment and find their way into the finished material, thus interfering with the grade of the product, and to avoid this fault is the purpose of the present invention.

To this end it is proposed to embody in the machine a means which absolutely in sures equal treatment of all particles of the original material thus producing a uniform grade in the finished product. The improvement is such that it may be readily applied to machines of the afore-mentioned type, and without any alterations in their existing arrangement.

A second feature contemplated by the present invention consists of a. means for dislodging such material as accumulates between the rotary cutter and the main anvil and thus avoiding the wear to the cutter incident to such accumulation.

The invention is shown by way of illustration in the accompanying drawings,

wherein:-

Figure 1 is a side elevation of a machine, partly in section, showing the application of the present invention. Fig. 2 is an enlarged sectional view of a detail illustrating the idea. Fig. 3 is a top plan view of the supplemental anvil. Fig. 3 is a modified form of the supplemental anvil. Fig. L is a transverse sectional View of Fig. 3 taken on the line 44, and; Fig. 5 is a detail transverse sectional view of the cutter head showing the second feature of the invention.

Referring to the structure in further detail and with like reference characters indicating corresponding parts in the different views shown, 1 designates the machine casing suitably supported on the base 2, and having ournaled therein a shaft 3, on which is mounted a rotary cutter head; said head comprising two truncated cone sections 4: which carry each a plurality of cutting knives (not shown). An anvil 5 which cooperates with said knives is disposed intermediate the cone sections and is secured therein through the medium of bolts 6, said bolts being adjust-able within the support ing head 7 whereby to vary the anvils position. The aforesaid parts are of known construction and no claim thereto is made in the present case.

As above pointed out it frequently happens that particles of material in the shape of long slivers or shims escape the grinding action of the cutter knives and anvil by passing lengthwise between the cones 4-. and said anvil, taking substantially that direction indicated by the arrow a: in Fig. 2, and thus find their way into the receiver for the finished product. The present invention proposes to obviate this by providing an obstruction in the nature of a second or supplemental anvil 8 so located as to catch the slivers as they emerge from between the anvil 5 and the rotary cutter.

The anvil 8 is secured by bolts 9 to a head 10 that is formed integral with the head mount 7 of the first anvil. The obstructing end or head 11 of the anvil is downwardly disposed and pointed as shown in Figs. 2 and 3 respectively, and lies immediately adjacent the cones cutting surfaces. This disposal of the anvil head presents a blocking surface to the long slivers, which is sub stantially at right angles to their direction of travel, and to insure such contact the anvil head is recessed as at 12 (Fig. 4:) and the side edges 13 thereof are outwardly disposed and sharpened. The slivers projected against the anvils surface 12 are, in addition to this breaking action, further subjected to granulation through the medium of the rotary cutter as in the first instance. Under some conditions it may be advisable to roughen the recessed surface, as shown at l2 in Fig. 3 as this would tend to abruptly interrupt the lengthwise travel of the pieces.

Referring to the second feature of the present invention 2'. e. the means for preventing lodgment of the shims or other material in the spaces between the point 3 of the anvil 5 and the rotary cutter; and the wearing to the cutter consequent thereto; said cutter is provided with a plurality of pins 14: secured to the cone sections, as shown in Fig. 5. These pins have each a projecting portion 15, and are all disposed at equal intervals on the inner peripheral edge of the cutter head.

In operation the pin projecting portions 15 are designed to pass clear of the anvils 5 and 8, but yet sufficiently near thereto to insure the dislodgment of any material which accumulates between the anvil points and the inner cone edges; and there is the further feature that the pins will act to force the slivers against the anvil and cause their reduction.

I'Vhat is claimed is 2- 1. In a grinding machine, the combination of; a rotary cutter head comprising cone sections oppositely disposed; an anvil mounted intermediate said sections; and a second anvil mounted beneath the first named anvil, said second anvil having a downwardly disposed and pointed'end portion located intermediate the cone sections, and said downwardly inclined portion having a concaved face and provided with'sharp side edges; said second anvil adapted toeffect the reduction of material escaping the grinding action of said cutter and the first anvl 2. The combination with the, rotary cutter 0 comprising cone sections, and the anvil of a grinding machine; of a second anvil disposed adjacent and beneath the first named anvil; and a plurality of pins mounted on said sections at their engaging portions; and disposed parallel to the axis of the cutter; said cutter, second anvil, and pins adapted to effect the reduction of material escaping the grinding action of said cutter and the first anvil.

3. The combination with the cone section cutter head, and anvil of a grinding machine; of a plurality of pins secured within said cone sections, said pins disposed parallel with the axis of said cutter head and located adjacent the meeting edges of said sections and having portions projecting therefrom; said pins adapted to cooperate with said anvil to dislodge accumulated material, as set forth.

4. In a wood grinding machine, the combination of; a rotary cutter head comprising cone sections oppositely disposed; an anvil mounted between said sections, a sec ond anvil mounted intermediate said sections and beneath the first named anvil; and pins mounted in said sections adjacent their engaging edges and disposed parallel to the cutteraxis, said pins projecting from between said sections and providing dislodging devices for accumulated material, as setforth.

In testimony whereof, I aflix my signature, in presence of two witnesses.

FREDERICK E. MARTIN.

Witnesses:

J. V. TAYLOR, J. M. VVARREN'.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

